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-0.7=8.3-3f
We move all terms to the left:
-0.7-(8.3-3f)=0
We add all the numbers together, and all the variables
-(-3f+8.3)-0.7=0
We get rid of parentheses
3f-8.3-0.7=0
We add all the numbers together, and all the variables
3f-9=0
We move all terms containing f to the left, all other terms to the right
3f=9
f=9/3
f=3
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